T. Miyai, I. Suzuki, M. Hasegawa, T. Omata, S. Kawanish, "Orientations and J-V characteristics of SnS homojunction solar cells fabricated by LPE", PVSEC-35, Numazu, Japan, Nov 16 2024 (Poster)
T. Saito, Y. K. Sato, M. Terauchi, T. Omata, I. Suzuki, J. Kikkawa, "The evaluation of exciton size by angle-resolved EELS and the role of exciton size in photocatalytic function", EDGE2024 International Workshop on EELS and Related Techniques, Vancouver, Canada, June 10 2024 (Poster)
T. Omata, A. Sharma, I. Suzuki, K. Toyooka, T. Ishiyama, J. Nishii, "Suppression of electronic conduction by local structural change around vanadium ions induced by replacing sodium ions with protons in vanadophosphate glass", 24th International Conference on Solid State Ionics (SSI24), London, UK, July 16 2024 (Oral)
I. Suzuki, K. Washizu, M. Kita, T.Omata, "Synthesis of solar-cell absorber β-CuGaO2 by ion exchange of β-LiGaO2", STAC-D2MatE 2024, Tsukuba, Japan, Feb 29 2024 (Poster)
I. Suzuki, T. Omata, "DFT prediction and experimental verification of possibility of ion-exchange reactions in wurtzite-type ternary oxide semiconductors applicable to optoelectronic devices in a wide wavelength regions", MRM2023/IUMRS-ICA2023, Kyoto, Japan, Dec 12 2023 (Oral)
R. Fujimaru, I. Suzuki, T. Omata, M. Kita "Evaluation of electrical characteristics of Cu3VO4 thin film deposited by ultrasonic spray pyrolysis", STI-Gigaku, Nagaoka, Japan, Nov 6, 2023 (Poster)
S. Izumi, M. Inoue, T. Homma, I. Suzuki, T. Omata, M. Kita "Band gap engineering of Cu2ZnGeO4 with wurtzite-related structure", STI-Gigaku, Nagaoka, Japan, Nov 6, 2023 (Poster)
S. Igarashi, I. Suzuki, T. Omata, M. Kita "Synthesis of β-CuGaO₂ thin films by cation-exchange in alcohol", STI-Gigaku, Nagaoka, Japan, Nov 6, 2023 (Poster)
T. Ishiyama, Y. Yamada, H. Nagashima, I. Suzuki, M. Fujioka, M. Ono, T. Omata, J. Nishii "Suppression of proton migration by SiO6 in phosphate glasses and its mitigation by AlO6 substitution", Solid State Proton Conductors (SSPC-21), Fukuoka, Japan, Sep 18, 2023 (Oral)
I. Suzuki, S. Kawanishi, S. R. Bauers, A. Zakutayev, M. Kim, H. Yanagi, T. Omata "N-type SnS and its application to homojunction solar cells", PVSEC-33, Nagoya, Japan, Nov 16, 2022 (Poster)
T. Omata, A. Sharma, I. Suzuki, T. Ishiyama, J. Nishii "Proton Conductivity and Thermal Stability of Anhydrous Silico- and Germano-Phosphoric Acid Glasses", 23rd International Conference on Solid State Ionics (SSI-23), Boston, USA, July 19, 2022 (Oral)
I. Suzuki, B. Huang, S. Kawanishi, T. Omata, A. Klein "Close to energy gap band bending at SnS interface", E-MRS 2022 Spring Meeting, Online, 2 June, 2022 (Oral)
I. Suzuki, S. Kawanishi, S. R. Bauers, A. Zakutayev, B. Huang, Z. Lin, H. Shibata, A. Klein, H. Yanagi, T. Omata "N-type SnS and its application to homojunction PV", 2022 MRS Spring Meeting & Exhibit, Online, May 23, 2022 (Invited, Oral)
I. Suzuki, S. Kawanishi, S.R. Bauers, A. Zakutayev, H. Shibata, M. Kim, H. Yanagi, T. Omata “N-type conduction in Cl-doped SnS thin film“, Materials Research Meeting 2021, Yokohama, Japan, December 14, 2021 (Oral)
T. Omata, I. Suzuki, A. Sharma,T. Kinoshita,T. Ishiyama, S. Kohara, T. Yamashita, H. Kawazoe, T. Fang, Y. Ren, M. Fujioka, M. Ono, G. Zhao, J. Nishii, “Understanding the effect of oxide components on proton mobility in phosphate glasses; statistical analysis and experimental studies“, Solid State Proton Conductors (SSPC-20), Online, October 1, 2021 (Oral)
S. Kawanishi, I. Suzuki, T. Omata, H. Shibata, “Solution growth of large single crystals of n type tin monosulfide“, ACCGE-22/OMVPE-20, Online, August 3, 2021 (Oral)
I. Suzuki, S. Kawanishi, S.R. Bauers, A. Zakutayev, H. Shibata, M. Kim, H. Yanagi, T. Omata, “N-Type SnS Thin Films Applicable for Homojunction Solar Cells”, 2021 Virtual MRS Spring Meeting & Exhibit, Online, April 18, 2021 (Oral)
I. Suzuki, S. Kawanishi, S.R. Bauers, A. Zakutayev, H. Shibata, H. Yanagi, T. Omata, “Fabrication of pn Homojunction of SnS and Its Photovoltaic Properties”, 2021 Virtual MRS Spring Meeting & Exhibit, Online, April 18, 2021 (Poster)
A. Klein, D. Moritz, K. Schuldt, I. Suzuki, “About the difficulties to achieve high photovoltages and conversion efficiencies with CuO and other Cu oxides”, Virtual Chalcogenide PV Conference 2020, Online, May 26, 2020 (Oral)
H. Yanagi, Y. Iguchi, K. Sato, K. Inoue, I. Suzuki, S. Kawanishi, “Growth of Halogen Doped n-Type SnS Single Crystals Using Self-Flux", Materials Research Meeting 2019, Yokohama, Japan, December 12, 2019 (Poster)
I. Suzuki, S. Kawanishi, Y. Iguchi, K. Sato, T. Omata, H. Yanagi, “Cl-doped SnS single crystal and its n-type conduction”, 2019 MRS Fall Meeting & Exhibit, Boston, USA, December 4, 2019 (Poster)
T. Watanabe, S. Suzuki, I. Suzuki, T. Omata, “Development of Mist-CVD Equipment for β-NaGaO2 Thin-Film Deposition”, TAIPEI TECH-IMRAM Symposium 2019, Sendai, Japan, November 26, 2019 (Poster)
H. Yanagi, Y. Iguchi, K. Sato, S. Kawanishi, I. Suzuki, “Growth of Cl-doped n-type SnS single crystals and their electrical properties” The 5th International Conference on Advanced Electromaterials, Jeju, Korea, November 6, 2019 (Oral)
M. Kita, I. Suzuki, N. Wada, T. Omata, “Phase transformations of the narrow gap oxide semiconductor Cu2ZnGeO4 with wurtzite-derived structure in Ar atmosphere” The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13), Okinawa, Japan, October 28, 2019 (Poster)
I. Suzuki, B. Huang, A. Klein, T. Omata, “Band alignment and Fermi level shift of β-CuGaO2” The 11th International Symposium on Transparent Oxide and Related Materials for Electronics and Optics (TOEO-11), Nara, Japan, October 7, 2019 (Poster)
M. Onaka, S. Kawanishi, I. Suzuki, H. Yanagi, “Effects of Cl implantation to SnS thin films” The 11th International Symposium on Transparent Oxide and Related Materials for Electronics and Optics (TOEO-11), Nara, Japan, October 7, 2019 (Poster)
B. Huang, K. Schuldt, N. Bein, I. Suzuki, A. Klein, “Energy band alignment and electrical properties of ferroelectrics” Joint ISAF-ICE-EMF-IWPM-PFM meeting 2019, Lausanne, Switzerland, July 18, 2019 (Poster)
I. Suzuki, N. Ohashi, A. Klein, T. Omata, “Electronic structure and band alignment of ternary wurtzite-type oxide semiconductor, β-CuGaO2” The 11th International Conference on the Science and Technology for Advanced Ceramics (STAC-11), Tsukuba, Japan, July 9, 2019 (Oral)
A. Klein, I. Suzuki, B. Huang, K. Schuldt, C.C. Chavarria, “The Fermi energy in acceptor doped SrTiO3 and BaTiO3” Nonstoichiometric Compounds VII, Miyazaki, Japan, March 11, 2019 (Poster)
I. Suzuki, “Novel candidate for solar cell absorber: Ternary wurtzite-type β-CuGaO2” Research seminar at National Renewable Energy Laboratory (NREL), Colorado, USA, December 11, 2018 (Oral)
I. Suzuki, H. Nagatani, M. Kita, T. Omata, “Fabrication of β-CuGaO2 Thin Films”, 10th International Workshop on Zinc Oxide and Other Oxide Semiconductors (IWZnO 2018), Warsaw, Poland, September 12, 2018 (Poster)
I. Suzuki, H. Nagatani, S. Takemura, M. Kita, T. Omata, “Conductivity Control of Ternary Wurtzite β-AgGaO2 by Impurity Doping”, 10th International Workshop on Zinc Oxide and Other Oxide Semiconductors (IWZnO 2018), Warsaw, Poland, September 12, 2018 (Poster)
M. Kita, I. Suzuki, N. Wada, T. Omata, “"Cu deficiency in the narrow gap oxide semiconductor Cu2ZnGeO4 with wurtzite-derived structure"”, 10th International Workshop on Zinc Oxide and Other Oxide Semiconductors (IWZnO 2018), Warsaw, Poland, September 12, 2018 (Poster)
I. Suzuki, A. Klein, T. Omata, “ XPS study of the band alignment of β-CuGaO2 with other oxides”, Data Science in Life Science and Engineering Collaboration and Symposium, 5th CWRU-Tohoku Joint Workshop, Sendai, Japan, August 3, 2018 (Poster)
B. Huang, I. Suzuki, R. Giesecke, A. Klein,” The influence of electrode material on the resistance degradation of Fe-doped SrTiO3”, Electroceramics XVI, Hasselt, Belgium, July 9, 2018 (Poster)
I. Suzuki, A. Klein, “Direct observation of the Fe impurity levels in BaTiO3 single crystal by electrical measurement”, 2017 MRS Fall Meeting & Exhibit, Boston, USA, November 30, 2017 (Oral)
M. Kita, I. Suzuki, M. Inoue, T. Omata, “Crystal and electronic structure of quaternary narrow gap oxide semiconductor Cu2ZnGeO4 with a wurtzite-derived structure”, 2017 MRS Fall Meeting & Exhibit, Boston, USA, November 28, 2017 (Poster)
R. Giesecke, B. Huang, I. Suzuki, A. Klein, “Modification of Schottky barrier heights during resistance degradation of Fe-doped SrTiO3”, 21st International Conference on Solid State Ionincs, Padua, Italy, June 20, 2017 (Oral)
A. Kakinuma, I. Suzuki, M. Ueda, T. Omata, “Flux grouwth of ternary wurtzite β-NaGaO2 and β-LiGaO2 single crystals”, 9th International Workshop on Zinc Oxide and Related Materials (IWZnO 2016), Taipei, Taiwan, November 1, 2016 (Oral)
T. Omata, H. Nagatani, Y. Mizuno, I. Suzuki, M. Kita, N. Ohashi, “Band gap engineering of wurtzite β-CuGaO2 by alloying with β-CuAlO2 and β-LiGaO2 and their electronic structures”, 9th International Workshop on Zinc Oxide and Related Materials (IWZnO 2016), Taipei, Taiwan, November 1, 2016 (Oral)
M. Kita, I. Suzuki, H. Nagatani, Y. Mizuno, M. Inoue, T. Omata, “New quaternary narrow gap oxide semiconductor Cu2ZnGeO4 with a wurtzite-derived structure”, 9th International Workshop on Zinc Oxide and Related Materials (IWZnO 2016), Taipei, Taiwan, November 1, 2016 (Poster)
H. Nagatani, I. Suzuki, M. Kita,T. Omata, “Control of electrical conductivity of ternary wurtzite β-AgGaO2”, 9th International Workshop on Zinc Oxide and Related Materials (IWZnO 2016), Taipei, Taiwan, October 30, 2016 (Poster)
T. Omata, Y. Mizuno, I. Suzuki, H. Nagatani, M. Kita, “Ternary and quaternary wurtzite-type oxide semiconductors: b -CuGaO2 and its related materials”, Compound Semiconductor Week 2016, Toyama, Japan, June 30, 2016 (Oral)
I. Suzuki, H. Nagatani, M. Kita, T. Omata, “Fabrication of β-CuGaO2 thin films; An oxide thin-film solar cell absorber”, 2015 MRS Fall Meeting & Exhibit, Boston, USA, December 2, 2015 (Oral)
I. Suzuki, H. Nagatani, M. Kita, T. Omata, “Fabrication of β-CuGaO2 thin films; An oxide thin-film solar cell absorber”, The 9th International Conference on the Science and Technology for Advanced Ceramics (STAC-9) and the 9th Symposium on Transparent Oxide and Related Materials for Electronics and Optics (TOEO-9), Tsukuba, Japan, October 20, 2015 (Poster)
A. Kakinuma, I. Suzuki, M. Ueda, T. Omata, "Flux growth of β-NaGaO2 single crystals and their ion-exchange to fabricate β-CuGaO2 and β-AgGaO2", The 9th International Conference on the Science and Technology for Advanced Ceramics (STAC-9) and the 9th Symposium on Transparent Oxide and Related Materials for Electronics and Optics (TOEO-9), Tsukuba, Japan, October 20, 2015 (Poster)
Y. Mizuno, H. Nagatani, I. Suzuki, M. Kita, T. Omata, “Band gap engineering of wurtzite-type narrow band gap semiconductor β-CuGaO2”, The 9th International Conference on the Science and Technology for Advanced Ceramics (STAC-9) and the 9th Symposium on Transparent Oxide and Related Materials for Electronics and Optics (TOEO-9), Tsukuba, Japan, October 20, 2015 (Poster)
I. Suzuki, H. Nagatani, M. Kita, H. Yanagi, T. Omata, “Novel ternary wurtzite semiconductor β-CuGaO2”, 17th International Conference on II-VI Compounds and Related Materials, Paris, France, September 15, 2015 (Oral)
I. Suzuki, H. Nagatani, M. Kita, T. Omata, “Fabrication of β-CuGaO2 thin films”, 17th International Conference on II-VI Compounds and Related Materials, Paris, France, September 15, 2015 (Poster)
I. Suzuki, H. Nagatani, M. Kita, H. Yanagi, N. Ohashi, T. Omata, “Novel ternary wurtzite-type semiconductor, β-CuGaO2”, 2014 MRS Fall Meeting & Exhibit, Boston, USA, December 3, 2014 (Oral)
I. Suzuki, H. Nagatani, M. Kita, H. Yanagi, N. Ohashi, T. Omata, “First principle calculations of wurtzite β-CuGaO2 and β-AgGaO2”, 2014 MRS Fall Meeting & Exhibit, Boston, USA, December 1, 2014 (Poster)
I. Suzuki, Y. Arima, M. Kita, T. Omata, “Band gap narrowing of ZnO by alloying with β-AgGaO2”, 8th International Workshop on Zinc Oxide and Related Materials (IWZnO 2014), Niagara Falls, Canada, September 9, 2014 (Poster)
I. Suzuki, H. Nagatani, M. Kita, Y. Iguchi, C. Sato, H. Yanagi, N. Ohashi, T. Omata, “First principle calculation of electronic band structure of wurtzite β-CuGaO2 and β-AgGaO2”, 8th International Workshop on Zinc Oxide and Related Materials (IWZnO 2014), Niagara Falls, Canada, September 8, 2014 (Poster)
H. Nagatani, I. Suzuki, M. Kita, H. Yanagi, N. Ohashi, T. Omata, “A new ternary oxide semiconductor; Wurtzite CuGaO2”, 8th International Workshop on Zinc Oxide and Related Materials (IWZnO 2014), Niagara Falls, Canada, September 8, 2014 (Poster)
I. Suzuki, H. Nagatani, M. Kita, Y. Iguchi, C. Sato, H. Yanagi, N. Ohashi, T. Omata, “First principle calculations of electronic band structures of wurtzite β-CuGaO2 and β-AgGaO2”, The 3rd International Seminar: International Workshop on Green Energy Conversion, Yamanashi, Japan, August 25, 2014 (Poster)
H. Nagatani, I. Suzuki, M. Kita, H. Yanagi, N. Ohashi, T. Omata, “A new direct and narrow band gap oxide semiconductor; Wurtzite CuGaO2”, The 3rd International Seminar: International Workshop on Green Energy Conversion, Yamanashi, Japan, August 25, 2014 (Poster)
Y. Mizuno, H. Nagatani, I. Suzuki, M. Kita, T. Omata, “Band gap engineering of wurtzite-derived CuGaO2 with CuAlO2”, The 3rd International Seminar: International Workshop on Green Energy Conversion, Yamanashi, Japan, August 25, 2014 (Poster)
I. Suzuki, H. Nagatani, M. Kita, Y. Iguchi, C. Sato, H. Yanagi, N. Ohashi, T. Omata, “First principle calculations of electronic band structures of wurtzite β-CuGaO2 and β-AgGaO2”, The Eighth International Conference on the Science and Technology for Advanced Ceramics (STAC8), Yokohama, Japan, June 26, 2014 (Poster)
H. Nagatani, I. Suzuki, M. Kita, H. Yanagi, N. Ohashi, T. Omata, “A new direct and narrow band gap oxide semiconductor; Wurtzite CuGaO2”, The Eighth International Conference on the Science and Technology for Advanced Ceramics (STAC8), Yokohama, Japan, June 26, 2014 (Poster)
I. Suzuki, Y. Arima, M. Kita, T. Omata, “Band gap engineering of ZnO by alloying with β-AgGaO2”, The 2nd International Seminar: International Workshop on Green Energy Conversion, Nagano, Japan, September 2, 2013 (Poster)
C. Sato, H. Yanagi, I. Suzuki, T. Omata, T. Kamiya, H. Hosono, “Band-gap engineering of high mobility amorphous oxide semiconductor, a-Cd-Ga-O”, The 2nd International Seminar: International Workshop on Green Energy Conversion, Nagano, Japan, September 2, 2013 (Poster)
I. Suzuki, Y. Arima, M. Kita, T. Omata, “Band gap narrowing of ZnO by alloying with β-AgGaO2”, 8th International Symposium on Transparent Oxide and Related Materials for Electronics and Optics (TOEO8), Tokyo, Japan, May 15, 2013 (Oral)
C. Sato, H. Yanagi, I. Suzuki, T. Omata, T. Kamiya, H. Hosono, “Band-gap control in amorphous oxide semiconductor Cd-Ga-O thin films”, 2013 MRS Spring Meeting & Exhibit, California, USA, April 3, 2013 (Oral)
I. Suzuki, Y. Arima, M. Kita, T. Omata, “New pseudo-binary alloy system of x(AgGaO2)1/2—(1-x)ZnO for band gap narrowing of ZnO”, 2013 MRS Spring Meeting & Exhibit, California, USA, April 2, 2013 (Poster)
I. Suzuki, T. Omata, Y. Shiratsuchi, R. Nakatani, S. Otsuka-Yao-Matsuo, “Fabrication of ZnF2 thin film and their transparency in vacuum ultraviolet”, IUMRS-ICA 12th International Conference in Asia, Taipei, Taiwan, September 11, 2011 (Poster)